Evrard, Veerle M.D.1; Vielle, Guy M.D.3; Buyck, Albert M.D.3; Merchez, Marcel M.D.4
1University Hospital Gasthuisberg
Leuven
Belgium
3St Elisabeth-hospital
Ukkel
Belgium
4Deux-Alices-Hospital
Ukkel
Belgium
2Department of Surgery
Universitaire Ziekenhuizen
Herestraat 49
B-3000
Leuven
Belgium
The work was performed in St Elisabeth-hospital, Avenue Defré, 206, B-1180 Ukkel, Belgium.